All things related to privacy and security while connected to the internet.
The first easy step is choosing a private and secure browser, especially with the right addons.
Never ever use your default DNS, Google DNS or Cloudflare DNS.
Always use a secure, encrypted DNS protocol like DNS-over-TLS (DoT) or DNS-over-HTTPS (DoH).
If you don't set up your own Pi-hole (you should), consider a provider with built-in adblocking.
First, pick a provider:
This is a good start, but what you really want for optimal privacy is to configure DNS-over-TLS or DNS-over-HTTPS:
Configuring DNS-over-TLS on an OpenWRT Router (don't use Cloudflare though, change it to one of the above DNS servers)
Configuring DNS-over-HTTPS in LibreWolf (or Firefox):
General > Network Settings > Settings
Enable DNS over HTTPS
https://doh.libredns.gr/dns-query(or a DNS server of your choice)
There is a lot of debate regarding whether or not most people need a VPN, particularly with the increased adoption of the https protocol.
If you decide to buy a VPN subscription, make sure it meets the following criteria:
Good, free options:
Instead of using your router's default firmware, install a secure, open source firmware:
Disabling Intel Management Engine (Advanced):